Ran Memtest86+ but no errors were detected; I've also tried updating a few drivers but so far nothing's worked. Sometimes I get the BSOD; other times my computer just restarts randomly. I don't remember installing anything recently that could be the cause of this.
I run Windows 7 Home Premium 64bit SP1. The original OS was Vista; 7 was obtained via an upgrade disk. My system is two years old. Since I don't have the retail disk, I haven't re-installed Windows or anything like that.
Thanks in advance for any help~